Haimi, H., Mulas, M., Sahlstedt, K. & Vahala, R., 2009, (The 11th Nordic/NORDIWA Wastewater Conference, Odense, Tanska, 10.-12.200911th Nordic/NORDIWA).
Haimi, H., Mulas, M., Sahlstedt, K. & Vahala, R., 2009, (10th IWA Conference on Instrumentation, Control and Automation, Cairns, Australia, 14.-17.6.2009).